On the abundance of Dermatophagoides pteronyssinus (Trouessart, 1897) (Pyroglyphidae: Acarina) in house dust

Abstract
Summary: The dominance of the Pyroglyphidae in house dust has been influenced by a number of factors. The humidity in houses dropped recently to such an extent that only Pyroglyphidae can survive. When temperature and relative humidity are favorable for Acarus siro and Glycyphagus destructor as well as Dermatophagoides pteronyssinus, Dermatophagoides diminished in numbers by competition. Introduction of the predator Cheyletus eruditus into this mixed breeds causes the extermination of Dermatophagoides. The vacuum cleaner trapped mites, but Dermatophagoides was protected by its habit to hide in cracks and crevices. The use of insecticides has a more killing effect on Acarus and Glycyphagus than on Dermatophagoides.

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